jbooker82 Posted August 12, 2006 Report Share Posted August 12, 2006 Is it worth going from a Proflow kit with K&N filter no air box lid to running K&N filters that clamp right on to the carbs. For those guys that have done this how did your jetting change? Just a clip position, UP how many main jet sizes, Different carb needles? I have the mods and jetting in my sig and it runs awesome. I put on these clamp on filters and it falls on its face bad with current jetting in my sig. I have tried 158 and 160 main jets. CEK needles clip position 3rd, 4th and 5th CEG needles clip position 3rd, and 4th The best i got it to run was with the 160 main jet and needle on the 5th clip position. It still had a bog in the mid to upper mid range. I look at what some people run with Keihin PJ carbs and i am way rich compaired to that. 421 stroker and they are in the 150-155 main jet size. Do i need to go with a bigger main jet still? Try a different Needle? Thanks for your help it is much appreciated. josh Quote Link to comment Share on other sites More sharing options...
hittintrees srh Posted August 12, 2006 Report Share Posted August 12, 2006 (edited) ya know what dude, dont waist your time/money.....your pro flow kt is prbably as good as pods, at least damn near.. i have pods and love em, put its not like your going from stock air box and filter to pods...i doubt you would notice a performance differance at all. instead get an adjustable timming plate or have your flywheel lightend or someting of that nature.you will see better gains out of something like that for sure. just thinkin out loud. Edited August 12, 2006 by hittintrees srh Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted August 12, 2006 Author Report Share Posted August 12, 2006 Well the thing is that I already bought them and installed them. I am just getting frustrated with the jetting for them. I was running the air box with proflow no lid pj34mm carbs with just the UPP 34mm carb boots.(mods and jetting in my sig) It ran great. I went to one of those thick Boss Racing Intakes so my carbs wouldnt hit on the clutch arm. When I had just the UPP boots getting that air box in there was a royal pain. It has to be impossible to get in there with a Boss Racing billit intake. So far I have went up 2 main sizes(160 currently) and it still doesnt run quite right, not as good as when i had the air box. I have also tired every clip position from 3rd (middle) to 5th(bottom). The best i got it to run today was with 160 main and CEK needle on the 5th clip position. I orderd some more jets 162,165,168. I will keep going up. I was just wondering about other guys that have went from K&N with no lid to pods, and how much more did they have to jet up. josh Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 12, 2006 Report Share Posted August 12, 2006 About 2 to 4 sizes on stock carbs, not sure about the PJs though... How do your plugs look Josh? Are your K&N flters overoiled? It's just possible your port job wants a fatter main... You should at the very least get as goof of performance, if not a little better. Too bad I didn't know you needed spacers, you could've bought those along with the sheilds... They would've been a cheap alternative to buying that Boss intake, although a built in crossover is nice! Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted August 13, 2006 Author Report Share Posted August 13, 2006 Too bad I didn't know you needed spacers, you could've bought those along with the sheilds... They would've been a cheap alternative to buying that Boss intake, although a built in crossover is nice! The built in cross over is kind of why i went that route. Sand kept working its way between the boost bottle and rubber carb boots. I even put screw on type clamps on instead of the factory squeez type. I havent pulled the plugs out yet. I was trying to get the top end - main jet - dailed in to do a plug chop. Then I was going to try to figure out the needles and clip postions. When i first started out doing my jetting you would give it gas and it would act like you just turned it off. You would just hear the sound coming from the carbs. Wich would be lean right. It got better as I went up on main jet sizes. I have a 160 in right now because that is all the bigger I have. I got 162,165,168 coming in the mail. Quote Link to comment Share on other sites More sharing options...
wesw Posted August 13, 2006 Report Share Posted August 13, 2006 might need a thinner needle like a DEK YOU said it was mid to upper rpm range. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted August 13, 2006 Author Report Share Posted August 13, 2006 might need a thinner needle like a DEK YOU said it was mid to upper rpm range. I was thinking about trying a couple of different needles. Right now i only have the CEG and CEK. I will order a DEK set Do you have any other needle suggestions besides the dek that i might try. Thanks again everybody for the help. josh Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.